品牌:罗斯蒙特 | 规格:01984-0298-0001 电源 | 材质:01984-0298-0001 电源 |
产地:美国 |
01984-0298-0001 电源
01984-0298-0001 电源
01984-0298-0001 电源
光纤是一种传输光信号的传输媒介。光纤的结构如图7-5所示,处于光纤内层的纤芯是一种横截面积很小、质地脆、易断裂的光导纤维,制造这种纤维的材料可以是玻璃也可以是塑料。纤芯的外层裹有一个包层,它由折射率比纤芯小的材料制成。正是由于在纤芯与包层之间存在着折射率的差异,光信号才得以通过全反射在纤芯中不断向前传播。在光纤的外层则是起保护作用的外套。通常都是将多根光纤扎成束并裹以保护层制成多芯光缆。
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